Results 61 to 70 of about 1,517 (200)

Stars in the Silurian sky : Echinoderm holdfasts from the Carnic Alps, Austria [PDF]

open access: yes, 2014
A small collection of echinoderm holdfasts from the Ludlow Cardiola Formation of the Carnic Alps (Austria) contains a wide range of morphologies as a response of environmental adaptation.
Ausich, W. I.   +4 more
core   +5 more sources

Chitinozoan Contribution to the Ordovician and Lower Silurian Paleobiogeography [PDF]

open access: yesThe Journal of Geology, 1992
Relationships between various Lower Silurian chitinozoan assemblages are established using statistical methods such as calculation of the number of species in common and similarity coefficient. Conclusions clearly indicate that Eastern Canadian chitinozoan fauna are distinct from those of the north Gondwana margin.
Achab, Aïcha   +2 more
openaire   +2 more sources

Hirnantian (latest Ordovician) bio- and chemostratigraphy of the Stirnas-18 core, western Latvia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2010
Integrated study of the uppermost Ordovician Porkuni Stage in the Stirnas-18 core, western Latvia, has revealed one of the most complete Hirnantian successions in the eastern Baltic region.
Hints, Linda   +6 more
doaj  

The Llandovery (Silurian) conodont species diversity on the Upper Yangtze Platform, South China [PDF]

open access: yesEstonian Journal of Earth Sciences, 2014
Conodonts are one of the stratigraphically most important fossil groups in the Silurian Period. We examine the regional diversity dynamics of the Llandovery condonts on the Upper Yangtze Platform.
Zhongyang Chen   +3 more
doaj   +1 more source

Biostratigraphy and palaeogeography of lower Devonian Chitinozoans, from East and West Moesia, Romania [PDF]

open access: yes, 2005
The knowledge on the biostratigraphy of Moesia has been supplemented based on chitinozoan assemblages in two boreholes, one from East Moesia and the second one from West Moesia. Previous contributions on chitinozoans, acritarchs and miospores, using only
Vaida, M., Verniers, J.
core  

The paleobiogeographical significance of the Silurian and Devonian trilobites of Japan [PDF]

open access: yes, 2019
Six major groups of trilobites from the Silurian and Devonian of Japan are evaluated for their paleobiogeographical signature. Silurian illaenids and scutelluids show four generic-level and at least two species-level links with the Australian segment of ...
Komatsu, Toshifumi   +9 more
core   +1 more source

PRIMER REGISTRO PALINOLÓGICO DE LA FORMACIÓN PUNTA NEGRA (DEVÓNICO MEDIO-SUPERIOR), DE LA PRECORDILLERA DE SAN JUAN, ARGENTINA

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2010
This paper presents the first palynological record of the Punta Negra Formation, Devonian from the San Juan Precordillera, Argentina. Twelve acritarchs species, 11 spores species, 5 prasinophyte species, 2 chitinozoans genera and one incertae sedis were ...
Claudia V. Rubinstein
doaj  

Katian (Upper Ordovician) conodonts from Wales [PDF]

open access: yes, 2013
Middle and upper Katian conodonts were previously known in the British Isles from relatively small collections obtained from a few localities. The present study is mainly based on 17 samples containing more than 17 000 conodont elements from an ...
An   +85 more
core   +1 more source

Hulterstad brachiopods and associated faunas in the Vormsi Stage (Upper Ordovician, Katian) of the Lelle core, Central Estonia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2007
Integrated palaeontological and sedimentological study of the Upper Ordovician Vormsi Stage in the Lelle drill core section, Central Estonia, revealed an association of shelly fauna containing the endemic saukrodictyid brachiopod Hulterstadia cor (Wiman),
Nõlvak, Jaak   +3 more
doaj  

New evidence for the Hirnantian (Upper Ordovician) in Belgium? An integrated isotopical, biostratigraphic and sedimentologic approach

open access: yesCarnets de Géologie, 2005
The Hirnantian is an important time in Earth history as it includes one of the major episodes of continental glaciation and marine mass extinction (e.g. Brenchley et alii, 1994).
Grassineau Nathalie   +4 more
doaj  

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